Virus Types

Written by Eric in Uncategorized

People are always asking me what are the different types of malicious software that are attacking their computers, what are their names and what do they do. 

Malware, short for malicious software, is software designed to infiltrate a computer system without the owner’s informed consent. Malware includes computer viruses, worms, trojan horses, spyware, dishonest adware, crimeware, most rootkits, and other malicious and unwanted software. Malware is not the same as defective software that has a legitimate purpose but contains harmful bugs.

Adware is any software package which automatically plays, displays, or downloads advertisements to a computer after the software is installed on it or while the application is being used. Some types of adware are also spyware and can be classified as privacy-invasive software

A computer worm is a self-replicating Malware computer program. It uses a computer network to send copies of itself to other computers and it may do so without any user intervention.  Unlike a virus, it does not need to attach itself to an existing program. Worms almost always cause at least some harm to the network, if only by consuming bandwidth, whereas viruses almost always corrupt or modify files on a targeted computer.

A Trojan, sometimes referred to as a Trojan horse, is non-self-replicating malware that appears to perform a desirable function for the user but instead facilitates unauthorized access to the user’s computer system. Trojan horses are designed to allow a hacker remote access to a target computer system. Once a Trojan horse has been installed on a target computer system, it is possible for a hacker to access it remotely and perform various operations.

A rootkit is a software program or coordinated set of programs designed to gain control over a computer system or network of computing systems without being detected. In virtually all cases, the purpose and motive being to perform any manner of malign act upon a host computing system.

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